And if we implemented a $600 billion Kyoto plan, that would be 0.74 C.
The Kyoto Plan/Protocol is useless as written. Even the signers know it.
The focus here is on the convergence of scientific insight regarding what's likely to happen in the next century. The significance of this article, written by one of the most prominent and well-known global warming skeptics who also happens to be a competent scientist (there are some skeptics who aren't competent scientists, of course) is that there is some agreement beneath all of the back-and-forth rhetoric. The agreement is: the Earth is warming, and will warm at a faster rate in the 21st century than it warmed in the 20th century.